Receptacle adapter



FIG. 1 is a front elevational view of a receptacle adapter;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom view thereof.

FIG. 5 is a top view thereof; and,

FIG. 6 is another front elevational view thereof.

The broken line environmental showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a receptacle adapter, as shown and described. 